Add Claude PR Assistant workflow

Add GitHub Action to enable Claude Code integration for PR and issue assistance.
Responds to @claude mentions in comments and reviews.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: pditommaso

.github/workflows/claude.yml

@@ -0,0 +1,48 @@
+name: Claude PR Assistant
+
+on:
+  issue_comment:
+    types: [created]
+  pull_request_review_comment:
+    types: [created]
+  issues:
+    types: [opened, assigned]
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  claude-code-action:
+    if: |
+      (github.event_name == 'issue_comment' && contains(github.event.comment.body, '@claude')) ||
+      (github.event_name == 'pull_request_review_comment' && contains(github.event.comment.body, '@claude')) ||
+      (github.event_name == 'pull_request_review' && contains(github.event.review.body, '@claude')) ||
+      (github.event_name == 'issues' && contains(github.event.issue.body, '@claude'))
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+      issues: read
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Run Claude PR Action
+        uses: anthropics/claude-code-action@beta
+        with:
+          anthropic_api_key: ${{ secrets.ENG_ANTHROPIC_API_KEY }}
+          # Or use OAuth token instead:
+          # claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
+          timeout_minutes: "60"
+          # mode: tag  # Default: responds to @claude mentions
+          # Optional: Restrict network access to specific domains only
+          # experimental_allowed_domains: |
+          #   .anthropic.com
+          #   .github.com
+          #   api.github.com
+          #   .githubusercontent.com
+          #   bun.sh
+          #   registry.npmjs.org
+          #   .blob.core.windows.net